diff mbox series

[RFC,31/41] KVM: x86/pmu: Call perf_guest_enter() at PMU context switch

Message ID 20240126085444.324918-32-xiong.y.zhang@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86/pmu: Introduce passthrough vPM | expand

Commit Message

Xiong Zhang Jan. 26, 2024, 8:54 a.m. UTC 
From: Xiong Zhang <xiong.y.zhang@intel.com>

perf subsystem should stop and restart all the perf events at the host
level when entering and leaving the passthrough PMU respectively. So invoke
the perf API at PMU context switch functions.

Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
---
 arch/x86/kvm/pmu.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index cd559fd74f65..afc9f7eb3a6b 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -906,12 +906,16 @@  void kvm_pmu_save_pmu_context(struct kvm_vcpu *vcpu)
 	static_call_cond(kvm_x86_pmu_save_pmu_context)(vcpu);
 
 	perf_guest_switch_to_host_pmi_vector();
+
+	perf_guest_exit();
 }
 
 void kvm_pmu_restore_pmu_context(struct kvm_vcpu *vcpu)
 {
 	lockdep_assert_irqs_disabled();
 
+	perf_guest_enter();
+
 	perf_guest_switch_to_kvm_pmi_vector(kvm_lapic_get_lvtpc_mask(vcpu));
 
 	static_call_cond(kvm_x86_pmu_restore_pmu_context)(vcpu);